The difference in those numbers
between the WH and the CBO is an assumption of about half a percentage point greater economic growth through those years. No one knows what it will look like because no one knows how much growth there will be.
You know what, I bet Obama will have to raise taxes at some point because we ARE racking up the debt trying to fix the mess Bush left us in. But I addressed already the "seriousness" of the debt situation and not one of you right wingers argued against the fundamental points I made.